libstdc++-v3/testsuite/25_algorithms/partial_sort/1.cc

   1 // Copyright (C) 2005-2024 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 25.3.1.3 [lib.partial.sort]
  19
  20 #include <algorithm>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_iterators.h>
  23
  24 using __gnu_test::test_container;
  25 using __gnu_test::random_access_iterator_wrapper;
  26 using std::partial_sort;
  27
  28 typedef test_container<int, random_access_iterator_wrapper> Container;
  29
  30 void
  31 test1()
  32 {
  33   int array[]={2,1,0};
  34   Container con1(array, array + 2);
  35   Container con2(array, array);
  36   partial_sort(con2.begin(), con2.begin(), con2.end());
  37   partial_sort(con1.begin(), con1.begin(), con1.end());
  38   partial_sort(con1.begin(), con1.end(), con1.end());
  39 }
  40
  41 void
  42 test2()
  43 {
  44   int array[] = {6, 5, 4, 3, 2, 1, 0};
  45   Container con(array, array + 7);
  46   partial_sort(con.begin(), con.it(3), con.end());
  47   VERIFY(array[0] == 0 && array[1] == 1 && array[2] == 2);
  48 }
  49
  50 void
  51 test3()
  52 {
  53   int array[] = {0, 6, 1, 5, 2, 4, 3};
  54   Container con(array,array + 7);
  55   partial_sort(con.begin(), con.it(3), con.end());
  56   VERIFY(array[0] == 0 && array[1] == 1 && array[2] == 2);
  57 }
  58
  59 int
  60 main()
  61 {
  62   test1();
  63   test2();
  64   test3();
  65 }